Floating tool holder



1,513,647 P. SPIRITUS FLOATING TOOL HOLDER Filed Sept. 21 1921 Patented et, 28, 1924.

U N l T :1;

D T T PAUL SPIRITUS, 013 DETROIT, MICHIGAN.

FLOATING TOOL HOLDER.

Application filed September 21, 1821. Serial No. 502,226.

To all whom it may concern.

Be itknown that PAUL SrIRITUs, a. citizen of Germany, residing at Detroit, in the county of lVayne and State of Michigan, has invented new and useful Improvements in Floating Tool Holders, of which the following is a specification.

The object of the invention is to provide a. simple and efficient construction of floating tool holder or chuck for screw machines and similar devices as a means of facilitating the setting of the bit under conditions insuring accuracy as required in such machines to within minute fractions of an inch or degree of angle; and with this object in View the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying drawings, wherein Figure 1 is a side view of a holder embodying the invention.

Figure 2 is a, sectional view tudinally of the same.

Figure 3 is a transverse section thereof.

The holder or chuck consists of a tubular shaped member 10 having the flared exteriorly threaded head 11 fitted with a hollow cap nut 12 and enclosing a spherical carrier 13 consisting of a ball provided with a diametrica-l bore 14 which constitutes a seat for the shank of the bit 15. The bit shank is secured in the bottom of the carrier by means of a set-screw 16 threaded into a lateral opening 17 in the ball, and introduced between the surface of the carrier and the taken longithe required through the movement adjustment of the carrier of the bit may be effected to insure accuracy of position of the bit whereupon will lock the spherical form of the carrier the turning of the cap screw carrier firmly in place. The provides for a universal adjustment of the seat for the bit shank so that fraction of air with the minimum of accuracy to within a minute inch or degree may be secured effort and expenditure of time on the part of the operator.

Having described claimed as new and the invention, what is useful 1s:

A screw machine chuck having an exteriorly threaded head, a cap nut threading- P 1y engaging said head the latter: to bit carrier enc and cooperating with form a housing, a. spherical losed within said housing and provided with a diametrical bore, concaved seating rings disposed on d1ametr1cally opposite sides of cap and head the carrier and engaging the respectively, and a set-screw threadingly engaged with a lateral opening in the bit carrier for bearing engagement on the shank of a bit carried in the of, said set-screw bore therepassing loosely through a radial opening formed in said cap.

In testimon nature.

y whereof he aifixes his sig- PAUL SPIRITUS. 

